The Man Who Folded Himself
This is a book that’s been recommended to me off and on over the years. It’s in print again and after getting hooked on Gerrold’s War Against the Chtorr series last summer I read this back in January. I think I like Heinlein’s “By His Bootstraps” a little bit better, but this is definitely a keeper in the time-travel sub-genre. What it does nicely is to explore the human dimension relentlessly.